UPDATE to stretch

Remove references to eth0 in interfaces

root@raspberrypi:~# nano /etc/network/interfaces

(Comment or delete everything below iface lo inet loopback)

# interfaces(5) file used by ifup(8) and ifdown(8)
# Please note that this file is written to be used with dhcpcd
# For static IP, consult /etc/dhcpcd.conf and 'man dhcpcd.conf'
# Include files from /etc/network/interfaces.d:
source-directory /etc/network/interfaces.d
auto lo
iface lo inet loopback